Subversion Repositories openrisc

// Copyright 2011 The Go Authors.  All rights reserved.

// Use of this source code is governed by a BSD-style

// license that can be found in the LICENSE file.

// Socket options for Windows

package net

import (

        "os"

        "syscall"

)

func setDefaultSockopts(s syscall.Handle, f, t int) error {

        switch f {

        case syscall.AF_INET6:

                // Allow both IP versions even if the OS default is otherwise.

                // Note that some operating systems never admit this option.

                syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, 0)

        }

        // Windows will reuse recently-used addresses by default.

        // SO_REUSEADDR should not be used here, as it allows

        // a socket to forcibly bind to a port in use by another socket.

        // This could lead to a non-deterministic behavior, where

        // connection requests over the port cannot be guaranteed

        // to be handled by the correct socket.

        // Allow broadcast.

        syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)

        return nil

}

func setDefaultMulticastSockopts(s syscall.Handle) error {

        // Allow multicast UDP and raw IP datagram sockets to listen

        // concurrently across multiple listeners.

        err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)

        if err != nil {

                return os.NewSyscallError("setsockopt", err)

        }

        return nil

}